
<?php 
define('NUM_BIG_BLOCK_DEPOT_BLOCKS_POS', 0x2c); 
define('SMALL_BLOCK_DEPOT_BLOCK_POS', 0x3c); 
define('ROOT_START_BLOCK_POS', 0x30); 
define('BIG_BLOCK_SIZE', 0x200); 
define('SMALL_BLOCK_SIZE', 0x40); 
define('EXTENSION_BLOCK_POS', 0x44); 
define('NUM_EXTENSION_BLOCK_POS', 0x48); 
define('PROPERTY_STORAGE_BLOCK_SIZE', 0x80); 
define('BIG_BLOCK_DEPOT_BLOCKS_POS', 0x4c); 
define('SMALL_BLOCK_THRESHOLD', 0x1000); 
// property storage offsets 
define('SIZE_OF_NAME_POS', 0x40); 
define('TYPE_POS', 0x42); 
define('START_BLOCK_POS', 0x74); 
define('SIZE_POS', 0x78); 
define('IDENTIFIER_OLE', pack("CCCCCCCC",0xd0,0xcf,0x11,0xe0,0xa1,0xb1,0x1a,0xe1)); 
//echo 'ROOT_START_BLOCK_POS = '.ROOT_START_BLOCK_POS."\n"; 
//echo bin2hex($data[ROOT_START_BLOCK_POS])."\n"; 
//echo "a="; 
//echo $data[ROOT_START_BLOCK_POS]; 
//function log 
function GetInt4d($data, $pos) 
{ 
$value = ord($data[$pos]) | (ord($data[$pos+1]) << 8) | (ord($data[$pos+2]) << 16) | (ord($data[$pos+3]) << 24); 
if ($value>=4294967294) 
{ 
$value=-2; 
} 
return $value; 
} 
class OLERead { 
var $data = ''; 
function OLERead(){ 
} 
function read($sFileName){ 
// check if file exist and is readable (Darko Miljanovic) 
if(!is_readable($sFileName)) { 
$this->error = 1; 
return false; 
} 
$this->data = @file_get_contents($sFileName); 
if (!$this->data) { 
$this->error = 1; 
return false; 
} 
//echo IDENTIFIER_OLE; 
//echo 'start'; 
if (substr($this->data, 0, 8) != IDENTIFIER_OLE) { 
$this->error = 1; 
return false; 
} 
$this->numBigBlockDepotBlocks = GetInt4d($this->data, NUM_BIG_BLOCK_DEPOT_BLOCKS_POS); 
$this->sbdStartBlock = GetInt4d($this->data, SMALL_BLOCK_DEPOT_BLOCK_POS); 
$this->rootStartBlock = GetInt4d($this->data, ROOT_START_BLOCK_POS); 
$this->extensionBlock = GetInt4d($this->data, EXTENSION_BLOCK_POS); 
$this->numExtensionBlocks = GetInt4d($this->data, NUM_EXTENSION_BLOCK_POS); 
/* 
echo $this->numBigBlockDepotBlocks." "; 
echo $this->sbdStartBlock." "; 
echo $this->rootStartBlock." "; 
echo $this->extensionBlock." "; 
echo $this->numExtensionBlocks." "; 
*/ 
//echo "sbdStartBlock = $this->sbdStartBlock\n"; 
$bigBlockDepotBlocks = array(); 
$pos = BIG_BLOCK_DEPOT_BLOCKS_POS; 
// echo "pos = $pos"; 
$bbdBlocks = $this->numBigBlockDepotBlocks; 
if ($this->numExtensionBlocks != 0) { 
$bbdBlocks = (BIG_BLOCK_SIZE - BIG_BLOCK_DEPOT_BLOCKS_POS)/4; 
} 
for ($i = 0; $i < $bbdBlocks; $i++) { 
$bigBlockDepotBlocks[$i] = GetInt4d($this->data, $pos); 
$pos += 4; 
} 
for ($j = 0; $j < $this->numExtensionBlocks; $j++) { 
$pos = ($this->extensionBlock + 1) * BIG_BLOCK_SIZE; 
$blocksToRead = min($this->numBigBlockDepotBlocks - $bbdBlocks, BIG_BLOCK_SIZE / 4 - 1); 
for ($i = $bbdBlocks; $i < $bbdBlocks + $blocksToRead; $i++) { 
$bigBlockDepotBlocks[$i] = GetInt4d($this->data, $pos); 
$pos += 4; 
} 
$bbdBlocks += $blocksToRead; 
if ($bbdBlocks < $this->numBigBlockDepotBlocks) { 
$this->extensionBlock = GetInt4d($this->data, $pos); 
} 
} 
// var_dump($bigBlockDepotBlocks); 
// readBigBlockDepot 
$pos = 0; 
$index = 0; 
$this->bigBlockChain = array(); 
for ($i = 0; $i < $this->numBigBlockDepotBlocks; $i++) { 
$pos = ($bigBlockDepotBlocks[$i] + 1) * BIG_BLOCK_SIZE; 
//echo "pos = $pos"; 
for ($j = 0 ; $j < BIG_BLOCK_SIZE / 4; $j++) { 
$this->bigBlockChain[$index] = GetInt4d($this->data, $pos); 
$pos += 4 ; 
$index++; 
} 
} 
//var_dump($this->bigBlockChain); 
//echo '=====2'; 
// readSmallBlockDepot(); 
$pos = 0; 
$index = 0; 
$sbdBlock = $this->sbdStartBlock; 
$this->smallBlockChain = array(); 
while ($sbdBlock != -2) { 
$pos = ($sbdBlock + 1) * BIG_BLOCK_SIZE; 
for ($j = 0; $j < BIG_BLOCK_SIZE / 4; $j++) { 
$this->smallBlockChain[$index] = GetInt4d($this->data, $pos); 
$pos += 4; 
$index++; 
} 
$sbdBlock = $this->bigBlockChain[$sbdBlock]; 
} 
// readData(rootStartBlock) 
$block = $this->rootStartBlock; 
$pos = 0; 
$this->entry = $this->__readData($block); 
/* 
while ($block != -2) { 
$pos = ($block + 1) * BIG_BLOCK_SIZE; 
$this->entry = $this->entry.substr($this->data, $pos, BIG_BLOCK_SIZE); 
$block = $this->bigBlockChain[$block]; 
} 
*/ 
//echo '==='.$this->entry."==="; 
$this->__readPropertySets(); 
} 
function __readData($bl) { 
$block = $bl; 
$pos = 0; 
$data = ''; 
while ($block != -2) { 
$pos = ($block + 1) * BIG_BLOCK_SIZE; 
$data = $data.substr($this->data, $pos, BIG_BLOCK_SIZE); 
//echo "pos = $pos data=$data\n"; 
$block = $this->bigBlockChain[$block]; 
} 
return $data; 
} 
function __readPropertySets(){ 
$offset = 0; 
//var_dump($this->entry); 
while ($offset < strlen($this->entry)) { 
$d = substr($this->entry, $offset, PROPERTY_STORAGE_BLOCK_SIZE); 
$nameSize = ord($d[SIZE_OF_NAME_POS]) | (ord($d[SIZE_OF_NAME_POS+1]) << 8); 
$type = ord($d[TYPE_POS]); 
//$maxBlock = strlen($d) / BIG_BLOCK_SIZE - 1; 
$startBlock = GetInt4d($d, START_BLOCK_POS); 
$size = GetInt4d($d, SIZE_POS); 
$name = ''; 
for ($i = 0; $i < $nameSize ; $i++) { 
$name .= $d[$i]; 
} 
$name = str_replace("\x00", "", $name); 
$this->props[] = array ( 
'name' => $name, 
'type' => $type, 
'startBlock' => $startBlock, 
'size' => $size); 
if (($name == "Workbook") || ($name == "Book")) { 
$this->wrkbook = count($this->props) - 1; 
} 
if ($name == "Root Entry") { 
$this->rootentry = count($this->props) - 1; 
} 
//echo "name ==$name=\n"; 
$offset += PROPERTY_STORAGE_BLOCK_SIZE; 
} 
} 
function getWorkBook(){ 
if ($this->props[$this->wrkbook]['size'] < SMALL_BLOCK_THRESHOLD){ 
// getSmallBlockStream(PropertyStorage ps) 
$rootdata = $this->__readData($this->props[$this->rootentry]['startBlock']); 
$streamData = ''; 
$block = $this->props[$this->wrkbook]['startBlock']; 
//$count = 0; 
$pos = 0; 
while ($block != -2) { 
$pos = $block * SMALL_BLOCK_SIZE; 
$streamData .= substr($rootdata, $pos, SMALL_BLOCK_SIZE); 
$block = $this->smallBlockChain[$block]; 
} 
return $streamData; 
}else{ 
$numBlocks = $this->props[$this->wrkbook]['size'] / BIG_BLOCK_SIZE; 
if ($this->props[$this->wrkbook]['size'] % BIG_BLOCK_SIZE != 0) { 
$numBlocks++; 
} 
if ($numBlocks == 0) return ''; 
//echo "numBlocks = $numBlocks\n"; 
//byte[] streamData = new byte[numBlocks * BIG_BLOCK_SIZE]; 
//print_r($this->wrkbook); 
$streamData = ''; 
$block = $this->props[$this->wrkbook]['startBlock']; 
//$count = 0; 
$pos = 0; 
//echo "block = $block"; 
while ($block != -2) { 
$pos = ($block + 1) * BIG_BLOCK_SIZE; 
$streamData .= substr($this->data, $pos, BIG_BLOCK_SIZE); 
$block = $this->bigBlockChain[$block]; 
} 
//echo 'stream'.$streamData; 
return $streamData; 
} 
} 
} 
?> 